What Makes a Good MRI Agent

Large molecule with long rotational correlation times. [Pg.79]

Gadolinium(iii) compounds are especially suited to this. The Gd + ion has a large number of unpaired electrons S = 7/2) and moreover its magnetic properties are isotropic. It has a relatively long electron-spin relaxation time, 10 s, which makes it more suitable than other very paramagnetic ions such as Dy +, Eu +, and Yb + s). These factors are [Pg.80]

The structure of Gd(dtpa)(H20) (reproduced by permission of Macmillan from S.A. Cotton, Lanthanides and Actinides, 1991, p. 64). [Pg.80]

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